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README.md

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+[php-fpm](https://php-fpm.org/) with php7.
+
+# Environment Variables
+## FPMUSER
+- default: nobody
+
+The user which runs the fpm process.
+
+## FPMGROUP
+- default: nobody
+
+The group which runs the fpm process.
+
+## MAX_UPLOAD_SIZE
+- default: 512M
+
+Maximal upload size.
+
+## PHP_ADMIN_VALUES
+Comma seperated list of php admin values.
+
+Each element is a key-value pair, seperated by an equal sign.
+
+
+## PHP_ADMIN_FLAGS
+Comma seperated list of php admin flags.
+
+Each element is a key-value pair, seperated by an equal sign.