Prepare Coolify deployment

.dockerignore

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+.git
+.gitignore
+.vs
+**/bin
+**/obj
+**/*.user
+**/*.suo
+README*

Dockerfile

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+FROM mcr.microsoft.com/dotnet/sdk:10.0-alpine AS build
+WORKDIR /src
+
+COPY QRPay/QRPay.csproj QRPay/
+RUN dotnet restore QRPay/QRPay.csproj \
+    --source https://api.nuget.org/v3/index.json
+
+COPY QRPay/ QRPay/
+RUN dotnet publish QRPay/QRPay.csproj \
+    --configuration Release \
+    --output /app/publish \
+    --no-restore
+
+FROM nginx:1.27-alpine AS final
+
+COPY nginx.conf /etc/nginx/conf.d/default.conf
+COPY --from=build /app/publish/wwwroot /usr/share/nginx/html
+
+EXPOSE 8080
+
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+    CMD wget --quiet --spider http://127.0.0.1:8080/ || exit 1
+

nginx.conf

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+server {
+    listen 8080;
+    server_name _;
+
+    root /usr/share/nginx/html;
+    index index.html;
+
+    location / {
+        try_files $uri $uri/ /index.html;
+    }
+
+    location ~* \.(?:css|js|json|wasm|png|jpg|jpeg|gif|ico|svg|woff2?)$ {
+        expires 7d;
+        add_header Cache-Control "public, no-transform";
+        try_files $uri =404;
+    }
+
+    location = /index.html {
+        add_header Cache-Control "no-cache";
+    }
+}
+