add basic entrypoint.sh file to set domains and admin email

docker-entrypoint.sh

@@ -0,0 +1,41 @@
+#/bin/sh
+
+## Required vars
+# CPAD_MAIN_DOMAIN
+# CPAD_SANDBOX_DOMAIN
+# CPAD_ADMIN_EMAIL
+# CPAD_CONF
+
+set -e
+
+CPAD_HOME="/cryptpad"
+
+# If cryptad conf isn't provided
+if [ ! -f "$CPAD_CONF" ]; then
+ echo -e "\n\
+         ############################################### \n\
+         Warning: No config file provided for CryptPad \n\
+         We will create a basic one for now but you should rerun this service \n\
+         by providing a file with your settings \n\
+         eg: docker run -v /path/to/config.js:/cryptpad/config/config.js \n\
+         ############################################### \n"
+
+   cp $CPAD_HOME/config/config.example.js $CPAD_CONF
+
+   # Set domains
+   sed -i  -e "s@\(httpUnsafeOrigin:\).*[^,]@\1 'https://$CPAD_MAIN_DOMAIN'@" \
+           -e "s@\(^ *\).*\(httpSafeOrigin:\).*[^,]@\1\2 'https://$CPAD_SANDBOX_DOMAIN'@" $CPAD_CONF
+
+   # Set admin email
+   if [ -z "$CPAD_ADMIN_EMAIL" ]; then
+     echo "Error: Missing admin email (Did you read the config?)"
+     exit 1
+   else
+     sed -i "s@\(adminEmail:\).*[^,]@\1 '$CPAD_ADMIN_EMAIL'@" $CPAD_CONF
+   fi
+ fi
+
+cd $CPAD_HOME
+npm run build
+
+exec "$@"