web: add builtin Let's Encrypt support

web/rootfs/etc/cont-init.d/10-config

@@ -8,12 +8,26 @@ mkdir -p \
     /var/tmp/nginx
 
 # generate keys (maybe)
-if [[ -f /config/keys/cert.key && -f /config/keys/cert.crt ]]; then
-	echo "using keys found in /config/keys"
+if [[ $ENABLE_LETSENCRYPT -eq 1 ]]; then
+    if [[ ! -f /etc/letsencrypt/live/$LETSENCRYPT_DOMAIN/fullchain.pem ]]; then
+        certbot certonly \
+            --noninteractive \
+            --standalone \
+            --preferred-challenges http \
+            -d $LETSENCRYPT_DOMAIN \
+            --agree-tos \
+            --email $LETSENCRYPT_EMAIL
+        cp /defaults/letsencrypt-renew /etc/cron.monthly/
+    fi
 else
-	echo "generating self-signed keys in /config/keys, you can replace these with your own keys if required"
-	SUBJECT="/C=US/ST=TX/L=Austin/O=jitsi.org/OU=Jitsi Server/CN=*"
-	openssl req -new -x509 -days 3650 -nodes -out /config/keys/cert.crt -keyout /config/keys/cert.key -subj "$SUBJECT"
+    # use self-signed certs
+    if [[ -f /config/keys/cert.key && -f /config/keys/cert.crt ]]; then
+        echo "using keys found in /config/keys"
+    else
+        echo "generating self-signed keys in /config/keys, you can replace these with your own keys if required"
+        SUBJECT="/C=US/ST=TX/L=Austin/O=jitsi.org/OU=Jitsi Server/CN=*"
+        openssl req -new -x509 -days 3650 -nodes -out /config/keys/cert.crt -keyout /config/keys/cert.key -subj "$SUBJECT"
+    fi
 fi
 
 # copy config files
@@ -22,7 +36,7 @@ if [[ ! -f /config/nginx/nginx.conf ]]; then
 fi
 
 if [[ ! -f /config/nginx/ssl.conf ]]; then
-    cp /defaults/ssl.conf /config/nginx/ssl.conf
+    tpl /defaults/ssl.conf > /config/nginx/ssl.conf
 fi
 
 if [ ! -f "/config/nginx/dhparams.pem" ]; then