diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..f3b6411
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1 @@
+**/.git
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..afb64c0
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,16 @@
+FROM openresty/openresty:alpine-fat
+LABEL maintainer "Jiang Yio <inportb@gmail.com>"
+
+RUN	apk add --no-cache openssl socat wget inotify-tools && \
+	luarocks install lua-resty-openidc && \
+	luarocks install lua-resty-session && \
+	rm /etc/nginx/conf.d/default.conf && \
+	mv /etc/nginx/conf.d /usr/local/openresty/nginx/conf/ && \
+	ln -s /usr/local/openresty/nginx/conf/conf.d /etc/nginx/ && \
+	echo '0 12 * * * /root/.acme.sh/acme.sh --cron --home /root/.acme.sh' >> /etc/crontabs/root
+RUN	wget -O - https://get.acme.sh | sh
+COPY	app /root
+
+WORKDIR	/root
+
+ENTRYPOINT ["/root/init.sh"]
diff --git a/README.md b/README.md
index 6ad7423..ae4c8ef 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,28 @@
 # docker-nginx-auto
 
+Nginx with tricks
+
+- OpenResty
+- Snippets for TLS/SSL, gzip, reverse proxy, websocket proxy, and proxy cache
+- Automatic Let's Encrypt certificate
+- Automatic reload on configuration change
+
+Production:
+
+```sh
+docker run -d --name=docker-nginx-auto \
+	-e ACME_EMAIL=user@host \
+	-p 80:80 -p 443:443 \
+	-v nginx-config:/usr/local/openresty/nginx/conf \
+	docker-nginx-auto
+```
+
+Staging:
+
+```sh
+docker run -d --name=docker-nginx-auto \
+	-e ACME_STAGING=true \
+	-p 80:80 -p 443:443 \
+	-v nginx-config:/usr/local/openresty/nginx/conf \
+	docker-nginx-auto
+```
diff --git a/app/acme-autocert.sh b/app/acme-autocert.sh
new file mode 100755
index 0000000..909f691
--- /dev/null
+++ b/app/acme-autocert.sh
@@ -0,0 +1,41 @@
+#!/bin/sh
+
+. /root/common.sh
+
+get_domains() {
+	cat /etc/nginx/conf.d/* \
+		| sed 's/^[[:blank:]]*//' \
+		| grep ^server_name \
+		| grep -v 'NOSSL' \
+		| cut -d';' -f1 \
+		| awk '{for(i=2; i<=NF; i++) print $i}' \
+		| awk '{$1=$1};1' \
+		| grep -E '^[[:alnum:]_-]+([.][[:alnum:]_-]+)*$' \
+		| sort | uniq
+}
+
+get_args() {
+	if [ "${ACME_STAGING}" != "" ]; then
+		echo --staging
+	fi
+	if [ "${ACME_EMAIL}" != "" ]; then
+		echo --email
+		echo "${ACME_EMAIL}"
+	fi
+	echo --issue
+	echo --webroot
+	echo /var/www
+	for h in `get_domains`; do
+		echo -d
+		echo "$h"
+	done
+}
+
+if [ "${RELOAD_FIRST}" != "no" ]; then
+	"${BIN}" -s reload
+fi
+if /root/.acme.sh/acme.sh \
+	--key-file "${CONF}/ssl.key" --fullchain-file "${CONF}/ssl.cer" \
+	"$@" `get_args`; then
+	"${BIN}" -s reload
+fi
diff --git a/app/acme-renew.sh b/app/acme-renew.sh
new file mode 100755
index 0000000..6363276
--- /dev/null
+++ b/app/acme-renew.sh
@@ -0,0 +1,3 @@
+#!/bin/sh
+
+/root/.acme.sh/acme.sh --cron "$@"
diff --git a/app/add-proxy.sh b/app/add-proxy.sh
new file mode 100755
index 0000000..22dedcf
--- /dev/null
+++ b/app/add-proxy.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+
+NAME="$1"
+URL="$2"
+
+. /root/common.sh
+
+cat > "${CONF}/conf.d/auto.${NAME}.conf" <<EOF
+server {
+	server_name	${NAME};
+	server_tokens	off;
+	include snippets/ssl.conf;
+	include snippets/gzip.conf;
+	location / {
+		proxy_pass      ${URL};
+		include         snippets/reverse-proxy.conf;
+	}
+}
+EOF
diff --git a/app/common.sh b/app/common.sh
new file mode 100644
index 0000000..511e30b
--- /dev/null
+++ b/app/common.sh
@@ -0,0 +1,2 @@
+BIN=/usr/local/openresty/bin/openresty
+CONF=/usr/local/openresty/nginx/conf
diff --git a/app/default/conf.d/01-http.conf b/app/default/conf.d/01-http.conf
new file mode 100644
index 0000000..0593d18
--- /dev/null
+++ b/app/default/conf.d/01-http.conf
@@ -0,0 +1,9 @@
+resolver local=on;
+lua_shared_dict sessions 10m;
+
+proxy_cache_path /var/cache/nginx levels=1:2 keys_zone=proxycache:5m max_size=5g inactive=60m use_temp_path=off;
+
+map $http_upgrade $connection_upgrade {
+	default upgrade;
+	''	close;
+}
diff --git a/app/default/snippets/gzip.conf b/app/default/snippets/gzip.conf
new file mode 100644
index 0000000..31c74df
--- /dev/null
+++ b/app/default/snippets/gzip.conf
@@ -0,0 +1,6 @@
+gzip		on;
+gzip_vary	on;
+gzip_min_length	10240;
+gzip_proxied	expired no-cache no-store private auth;
+gzip_types	text/plain text/css text/xml text/javascript application/x-javascript application/xml;
+gzip_disable	"MSIE [1-6]\.";
diff --git a/app/default/snippets/proxycache.conf b/app/default/snippets/proxycache.conf
new file mode 100644
index 0000000..564b93e
--- /dev/null
+++ b/app/default/snippets/proxycache.conf
@@ -0,0 +1,6 @@
+proxy_cache proxycache;
+proxy_cache_revalidate on;
+proxy_cache_min_uses 3;
+proxy_cache_use_stale error timeout invalid_header updating http_500 http_502 http_503 http_504;
+proxy_cache_background_update on;
+proxy_cache_lock on;
diff --git a/app/default/snippets/reverse-proxy.conf b/app/default/snippets/reverse-proxy.conf
new file mode 100644
index 0000000..709dd78
--- /dev/null
+++ b/app/default/snippets/reverse-proxy.conf
@@ -0,0 +1,7 @@
+proxy_set_header	Host $host;
+proxy_set_header	X-Real-IP $remote_addr;
+proxy_set_header	X-Forwarded-For $proxy_add_x_forwarded_for;
+proxy_set_header	X-Forwarded-Host $server_name;
+proxy_set_header	X-Forwarded-Proto $scheme;
+#proxy_set_header	X-Forwarded-Scheme $scheme;
+proxy_set_header	X-Scheme $scheme;
diff --git a/app/default/snippets/ssl.conf b/app/default/snippets/ssl.conf
new file mode 100644
index 0000000..35be789
--- /dev/null
+++ b/app/default/snippets/ssl.conf
@@ -0,0 +1,26 @@
+listen  80;
+listen  [::]:80;
+listen  443 ssl;
+listen  [::]:443 ssl;
+
+if ($scheme != "https") {
+	return	302 https://$host$request_uri;
+}
+
+# https://wiki.mozilla.org/Security/Server_Side_TLS
+# https://ssl-config.mozilla.org/
+ssl_certificate		ssl.cer;
+ssl_certificate_key	ssl.key;
+ssl_session_timeout	1d;
+ssl_session_cache	shared:SSL:10m;
+ssl_session_tickets	off;
+ssl_protocols		TLSv1.2 TLSv1.3;
+ssl_ciphers		ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-ECDSA-CHACHA20-POLY1305:ECDHE-RSA-CHACHA20-POLY1305:DHE-RSA-AES128-GCM-SHA256:DHE-RSA-AES256-GCM-SHA384;
+ssl_prefer_server_ciphers	off;
+add_header		Strict-Transport-Security "max-age=63072000" always;	# HSTS (needs ngx_http_headers_module)
+ssl_stapling		on;	# OCSP stapling
+ssl_stapling_verify     on;
+
+location /.well-known/ {
+	root /var/www;
+}
diff --git a/app/default/snippets/websocket-proxy.conf b/app/default/snippets/websocket-proxy.conf
new file mode 100644
index 0000000..02ec32b
--- /dev/null
+++ b/app/default/snippets/websocket-proxy.conf
@@ -0,0 +1,3 @@
+proxy_http_version	1.1;
+proxy_set_header	Upgrade $http_upgrade;
+proxy_set_header	Connection $connection_upgrade;
diff --git a/app/default/ssl.cer b/app/default/ssl.cer
new file mode 100644
index 0000000..76cb870
--- /dev/null
+++ b/app/default/ssl.cer
@@ -0,0 +1,18 @@
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/app/default/ssl.key b/app/default/ssl.key
new file mode 100644
index 0000000..968bbb9
--- /dev/null
+++ b/app/default/ssl.key
@@ -0,0 +1,28 @@
+-----BEGIN PRIVATE KEY-----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+-----END PRIVATE KEY-----
diff --git a/app/init.sh b/app/init.sh
new file mode 100755
index 0000000..a09c07e
--- /dev/null
+++ b/app/init.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+
+. /root/common.sh
+
+false | cp -ai /root/default/* "${CONF}/" 2>/dev/null
+
+if ! [ -e "${CONF}/sites-enabled" ]; then
+	ln -s conf.d "${CONF}/sites-enabled"
+fi
+
+mkdir -p /var/log/nginx /var/cache/nginx
+
+~/reloader.sh &
+(sleep 30; RELOAD_FIRST=no /root/acme-autocert.sh) &
+/usr/sbin/crond -b
+
+"${BIN}" -g 'daemon off;'
diff --git a/app/reloader.sh b/app/reloader.sh
new file mode 100755
index 0000000..8e41a0b
--- /dev/null
+++ b/app/reloader.sh
@@ -0,0 +1,14 @@
+#!/bin/sh
+
+. /root/common.sh
+
+while inotifywait -q -r -e create -e modify -e delete -e move \
+	--exclude .swp "${CONF}"; do
+	if "${BIN}" -t; then
+		echo "reloader: new configuration"
+		"${BIN}" -s reload
+		RELOAD_FIRST=no /root/acme-autocert.sh
+	else
+		echo "reloader: invalid configuration"
+	fi
+done