Initialize git-contribution-graph project with Docker setup, environment configuration, and core functionality for merging contributions from GitHub, GitLab, and Gitea into an SVG heatmap.

composer.json

@@ -0,0 +1,36 @@
+{
+    "name": "haylan/git-contribution-graph",
+    "description": "Unified contribution graph SVG for GitHub, GitLab and Gitea",
+    "type": "project",
+    "license": "MIT",
+    "require": {
+        "php": ">=8.2",
+        "symfony/cache": "^7.1",
+        "symfony/framework-bundle": "^7.1",
+        "symfony/http-client": "^7.1",
+        "symfony/runtime": "^7.1"
+    },
+    "autoload": {
+        "psr-4": {
+            "App\\": "src/"
+        }
+    },
+    "autoload-dev": {
+        "psr-4": {
+            "App\\Tests\\": "tests/"
+        }
+    },
+    "config": {
+        "optimize-autoloader": true,
+        "sort-packages": true,
+        "allow-plugins": {
+            "symfony/runtime": true
+        }
+    },
+    "extra": {
+        "symfony": {
+            "allow-contrib": false,
+            "require": "7.1.*"
+        }
+    }
+}