add docker functionality

docker-compose.yml

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+version: "3"
+services:
+
+  nginx:
+    build:
+      context: .
+      dockerfile: nginx/Dockerfile
+    image: nginx:alpine
+    ports:
+      - "8180:80"
+    volumes:
+      - data:/var/www/html
+
+  php:
+    build:
+      context: .
+      dockerfile: php/Dockerfile
+    depends_on:
+      - nginx
+    volumes:
+      - data:/var/www/html
+
+volumes:
+  data:

nginx/Dockerfile

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+FROM nginx:alpine
+RUN mkdir -p /var/www/html/src
+COPY nginx/default.conf /etc/nginx/conf.d/
+COPY ./data/src/ /var/www/html/src
+COPY ./data/update.php /var/www/html
+COPY ./data/.env.dist /var/www/html/.env
+VOLUME /var/www/html

nginx/default.conf

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+server {
+    listen 0.0.0.0:80;
+    root /var/www/html;
+    location / {
+        return 302 https://github.com/NiiWiiCamo/ownDynDNS;
+    }
+    location ~ \.php$ {
+        include fastcgi_params;
+        fastcgi_pass php:9000;
+        fastcgi_index index.php;
+        fastcgi_param SCRIPT_FILENAME $document_root/$fastcgi_script_name;
+    }
+}

php/Dockerfile

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+FROM php:fpm-alpine
+VOLUME /var/www/html