[TOOLS][DOCKER] Rewrite the configuration script to use whiptail/dialog, and refactor

docker/nginx/docker-compose.fragment.sh

@@ -0,0 +1,52 @@
+#!/usr/bin/sh
+
+cat <<EOF
+    nginx:
+        image: nginx:alpine
+EOF
+
+# If the user wants a PHP docker container
+if echo "${DOCKER}" | grep -Fq '"php"'; then
+    cat <<EOF
+        depends_on:
+            - php
+EOF
+fi
+
+cat <<EOF
+        restart: always
+        tty: false
+        ports:
+            - "${NGINX_HTTP_PORT}:80"
+            - "${NGINX_HTTPS_PORT}:443"
+        volumes:
+            # Nginx
+            - ./docker/nginx/nginx.conf:/var/nginx/social.conf
+            - ./docker/nginx/domain.sh:/var/nginx/domain.sh
+            # Certbot
+            - ./docker/certbot/www:/var/www/certbot
+            - ./docker/certbot/.files:/etc/letsencrypt
+            # social
+            - ./public:/var/www/social/public
+        env_file:
+            - ./docker/bootstrap/bootstrap.env
+            - ./docker/db/db.env
+EOF
+
+# If the user wants a Certbot docker container
+if echo "${DOCKER}" | grep -Fq '"certbot"'; then
+    cat <<EOF
+        command: /bin/sh -c '/var/nginx/domain.sh;
+                             while :; do
+                                 sleep 6h & wait \$\${!};
+                                 nginx -s reload;
+                             done &
+                             nginx -g "daemon off;"'
+
+EOF
+else
+    cat <<EOF
+        command: 'nginx -g \"daemon off;\"'
+
+EOF
+fi