fixed image version as default, extra compose file for custom image version

Reviewed-on: #6

.env.sample

@@ -2,7 +2,6 @@
 #SECRET_SMTP_PASSWORD_VERSION=v1
 
 TYPE=ghost
-#IMAGE_VERSION=6.3.1
 
 DOMAIN=ghost.example.com
 
@@ -15,18 +14,24 @@ SECRET_DB_PASSWORD_VERSION=v1
 SECRET_SMTP_PASSWORD_VERSION=v1
 
 ## Mail settings (mandatory)
-#MAIL_TRANSPORT=smtp
-#MAIL_FROM=admin@example.com
-#MAIL_OPTIONS_HOST=mail.example.com
-#MAIL_OPTIONS_PORT=587
+MAIL_TRANSPORT=smtp
+MAIL_FROM=admin@example.com
+MAIL_OPTIONS_HOST=mail.example.com
+MAIL_OPTIONS_PORT=587
+MAIL_OPTIONS_AUTH_USER=smtpuser@example.com
 #MAIL_OPTIONS_SECURE=false
-#MAIL_OPTIONS_AUTH_USER=smtpuser@example.com
 
 ## Advanced options
 # see here: https://docs.ghost.org/config#number-of-connections
 #DATABASE_POOL_MIN=2
 #DATABASE_POOL_MAX=15
 
+COMPOSE_FILE="compose.yml"
+
 ## Matrix-Synapse-Redirection
 # COMPOSE_FILE="$COMPOSE_FILE:compose.matrix.yml"
 # MATRIX_DOMAIN=matrix-synapse.example.com
+
+## Custom Image Version
+# COMPOSE_FILE="$COMPOSE_FILE:compose.customversion.yml"
+# IMAGE_VERSION=6.3.1

compose.customversion.yml

@@ -0,0 +1,3 @@
+services:
+  app:
+    image: ghost:${IMAGE_VERSION}-alpine

compose.yml

@@ -1,6 +1,6 @@
 services:
   app:
-    image: ghost:${IMAGE_VERSION:-6}-alpine
+    image: ghost:6.21.2-alpine
     environment:
       # see https://ghost.org/docs/config/#configuration-options
       database__client: mysql

release/1.1.1+6-alpine

@@ -0,0 +1 @@
+set mysql-pooling default to 0, added option to set it via env

renovate.json

@@ -0,0 +1,6 @@
+{
+  "$schema": "https://docs.renovatebot.com/renovate-schema.json",
+  "extends": [
+    "config:recommended"
+  ]
+}