[Core] github codespaces setup (#3287)

.devcontainer/Dockerfile

@@ -0,0 +1,7 @@
+FROM rssbridge/rss-bridge:latest
+
+RUN  apt-get update && \
+    apt-get install --yes --no-install-recommends \
+      git && \
+    pecl install xdebug && \
+    docker-php-ext-enable xdebug

.devcontainer/devcontainer.json

@@ -0,0 +1,23 @@
+{
+	"name": "rss-bridge dev",
+	"build": { "dockerfile": "Dockerfile" },
+	"customizations": {
+		// Configure properties specific to VS Code.
+		"vscode": {
+			// Set *default* container specific settings.json values on container create.
+			"settings": {
+				"php.validate.executablePath": "/usr/local/bin/php"
+			},
+
+			// Add the IDs of extensions you want installed when the container is created.
+			"extensions": [
+				"xdebug.php-debug",
+				"bmewburn.vscode-intelephense-client",
+				"philfontaine.autolaunch",
+				"eamodio.gitlens"
+			]
+		}
+	},
+	"forwardPorts": [3100, 9000, 9003],
+	"postCreateCommand": "cp .devcontainer/nginx.conf /etc/nginx/conf.d/default.conf && cp .devcontainer/xdebug.ini /usr/local/etc/php/conf.d/xdebug.ini && mkdir .vscode && cp .devcontainer/launch.json .vscode && echo '*' > whitelist.txt && chmod a+x \"$(pwd)\" && rm -rf /var/www/html && ln -s \"$(pwd)\" /var/www/html && nginx && php-fpm -D"
+}

.devcontainer/launch.json

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+{
+    // Use IntelliSense to learn about possible attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "name": "Listen for Xdebug",
+            "type": "php",
+            "request": "launch",
+            "port": 9003,
+            "auto": true
+        },
+        {
+            "name": "Launch currently open script",
+            "type": "php",
+            "request": "launch",
+            "program": "${file}",
+            "cwd": "${fileDirname}",
+            "port": 0,
+            "runtimeArgs": [
+                "-dxdebug.start_with_request=yes"
+            ],
+            "env": {
+                "XDEBUG_MODE": "debug,develop",
+                "XDEBUG_CONFIG": "client_port=${port}"
+            }
+        },
+        {
+            "name": "Launch Built-in web server",
+            "type": "php",
+            "request": "launch",
+            "runtimeArgs": [
+                "-dxdebug.mode=debug",
+                "-dxdebug.start_with_request=yes",
+                "-S",
+                "localhost:0"
+            ],
+            "program": "",
+            "cwd": "${workspaceRoot}",
+            "port": 9003,
+            "serverReadyAction": {
+                "pattern": "Development Server \\(http://localhost:([0-9]+)\\) started",
+                "uriFormat": "http://localhost:%s",
+                "action": "openExternally"
+            }
+        }
+    ]
+}

.devcontainer/nginx.conf

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+server {
+    listen 3100 default_server;
+    root /workspaces/rss-bridge;
+    access_log /var/log/nginx/rssbridge.access.log;
+    error_log /var/log/nginx/rssbridge.error.log;
+    index index.php;
+
+    location ~ /(\.|vendor|tests) {
+        deny all;
+        return 403; # Forbidden
+    }
+
+    location ~ \.php$ {
+        include snippets/fastcgi-php.conf;
+        fastcgi_pass 127.0.0.1:9000;
+    }
+}

.devcontainer/xdebug.ini

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+zend_extension=xdebug.so
+
+[xdebug]
+xdebug.mode=develop,debug
+xdebug.client_host=localhost
+xdebug.client_port=9003
+xdebug.start_with_request=yes
+xdebug.discover_client_host=false
+xdebug.log='/var/www/html/xdebug.log'