use explicit versions

.gitignore

@@ -1,3 +1,2 @@
 config.php
 vendor
-composer.lock

Dockerfile

@@ -1,18 +1,18 @@
-FROM docker.io/composer AS composer
+FROM docker.io/composer:latest AS composer
 
 WORKDIR /app
 
-COPY composer.json ./
+COPY composer.json composer.lock ./
 
 RUN composer install
 
 
 
-FROM docker.io/php:alpine
+FROM docker.io/php:7.4-alpine
 
 COPY --from=composer /app /app
 COPY main.php functions.php /app/
 
 WORKDIR /app
 
-ENTRYPOINT ["php", "main.php"]
+ENTRYPOINT ["php", "main.php"]

composer.lock

@@ -0,0 +1,72 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
+        "This file is @generated automatically"
+    ],
+    "content-hash": "2a31c469c141d9a2c27bb3cbe875b90b",
+    "packages": [
+        {
+            "name": "planetteamspeak/ts3-php-framework",
+            "version": "1.1.33",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/planetteamspeak/ts3phpframework.git",
+                "reference": "fb08150b1785bfd0c135f9a337d23be42344b46c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/planetteamspeak/ts3phpframework/zipball/fb08150b1785bfd0c135f9a337d23be42344b46c",
+                "reference": "fb08150b1785bfd0c135f9a337d23be42344b46c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.2.1"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "^2.0.0",
+                "phpunit/phpunit": "^4.8.35 || ^5.4.3 || ^6.0 || ^7.0",
+                "react/socket": "^0.8.5",
+                "satooshi/php-coveralls": "^1.1 || ^2.0",
+                "symfony/yaml": "~2.1|~3.0|~4.0"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "libraries/TeamSpeak3/TeamSpeak3.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "GPL-3.0"
+            ],
+            "authors": [
+                {
+                    "name": "Sven 'ScP' Paulsen",
+                    "email": "scp@planetteamspeak.com"
+                }
+            ],
+            "description": "Modern use-at-will framework that provides individual components to manage TeamSpeak 3 Server instances",
+            "homepage": "https://www.planetteamspeak.com",
+            "keywords": [
+                "api",
+                "filetransfer",
+                "interface",
+                "management",
+                "query",
+                "server",
+                "teamspeak",
+                "ts3"
+            ],
+            "time": "2018-08-03T11:46:37+00:00"
+        }
+    ],
+    "packages-dev": [],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": [],
+    "platform-dev": []
+}