php: add docker files

web/documentserver-example/php/Dockerfile

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+FROM php:8.2.8-fpm-alpine3.18 AS example
+WORKDIR /srv
+COPY . .
+RUN \
+	chown -R www-data:www-data /srv && \
+	apk update && \
+	apk add --no-cache \
+		composer \
+		make && \
+	make prod
+CMD ["make", "server-prod"]
+
+FROM nginx:1.23.4-alpine3.17 AS proxy
+COPY proxy/nginx.conf /etc/nginx/nginx.conf

web/documentserver-example/php/docker-compose.yml

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+version: "3.8"
+
+services:
+  document-server:
+    container_name: document-server
+    image: onlyoffice/documentserver:7.3.3.50
+    expose:
+      - "80"
+    environment:
+      - JWT_SECRET=your-256-bit-secret
+
+  example:
+    container_name: example
+    build:
+      context: .
+      target: example
+    expose:
+      - "80"
+    volumes:
+      - "example:/srv"
+    environment:
+      - ADDRESS=0.0.0.0
+      - DOCUMENT_SERVER_URL=http://localhost:8080/
+      - EXAMPLE_URL=http://proxy
+      - JWT_SECRET=your-256-bit-secret
+      - PORT=80
+
+  proxy:
+    container_name: proxy
+    build:
+      context: .
+      target: proxy
+    ports:
+      - "80:80"
+      - "8080:8080"
+    volumes:
+      - "example:/srv"
+
+volumes:
+  example:

web/documentserver-example/php/proxy/nginx.conf

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+worker_processes auto;
+
+events {
+	worker_connections 512;
+}
+
+http {
+	include /etc/nginx/mime.types;
+
+	server {
+		listen 80;
+		root /srv;
+		server_name localhost;
+
+		location / {
+			index index.html index.php;
+			try_files $uri $uri/ /index.php?$query_string;
+		}
+
+		location ~ \.php$ {
+			include fastcgi_params;
+
+			fastcgi_index index.php;
+			fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
+			fastcgi_pass example:80;
+		}
+	}
+
+	server {
+		listen 8080;
+		server_name localhost;
+
+		location / {
+			client_max_body_size 100m;
+			proxy_http_version 1.1;
+			proxy_pass http://document-server;
+			proxy_redirect off;
+			proxy_set_header Connection "upgrade";
+			proxy_set_header Host $http_host;
+			proxy_set_header Upgrade $http_upgrade;
+			proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
+			proxy_set_header X-Forwarded-Host $http_x_forwarded_host;
+			proxy_set_header X-Forwarded-Proto $http_x_forwarded_proto;
+			proxy_set_header X-Real-IP $remote_addr;
+		}
+	}
+}