First running version of PHP and nginx.

Dockerfile

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+FROM alpine:latest
+LABEL Maintainer="Christian Steinle <kontakt@steinle-computer.de>"
+LABEL Description="Lightweight container with Nginx 1.22 & PHP 8.1 based on Alpine Linux."
+
+WORKDIR /var/www/html
+
+# Set environment variable to serve not from /var/www/html but subpath, for e.g. Laravel.
+ENV SERVE_PATH=
+
+RUN apk update && \
+  apk upgrade && \
+  apk add --no-cache \
+    curl \
+    nginx \
+    php81 \
+    php81-bcmath \
+    php81-ctype \
+    php81-curl \
+    php81-dom \
+    php81-fileinfo \
+    php81-fpm \
+    php81-gd \
+    php81-mbstring \
+    php81-mysqli \
+    php81-openssl \
+    php81-pdo \
+    php81-pdo_mysql \
+    php81-pdo_pgsql \
+    php81-pdo_sqlite \
+    php81-tokenizer \
+    php81-xml \
+    php81-xsl \
+    php81-zip \
+    supervisor
+
+# Link to php, for calling "php artisan serve".
+RUN ln -s /usr/bin/php81 /usr/bin/php
+
+# Copy configuration and entrypoint. Entrypoint is needed to change nginx's document root if environement variable is given.
+COPY config/nginx.conf /etc/nginx/nginx.conf
+COPY config/fpm-pool.conf /etc/php81/php-fpm.d/www.conf
+COPY config/php.ini /etc/php81/conf.d/custom.ini
+COPY config/supervisord.conf /etc/supervisor/conf.d/supervisord.conf
+COPY config/entrypoint.sh /bin/entrypoint.sh
+
+RUN chmod a+x /bin/entrypoint.sh
+
+EXPOSE 8080
+
+RUN chown -R nobody:nobody /var/www/html /run /var/lib/nginx /var/log/nginx /etc/nginx
+
+ENTRYPOINT ["/bin/entrypoint.sh"]
+
+# Use unpriviledged user for security.
+USER nobody
+
+# Add healthcheck to container.
+HEALTHCHECK --timeout=10s CMD curl --silent --fail http://127.0.0.1:8080/fpm-ping
+