feat: add Dockerfile and auto publish. (#619)

Dockerfile

@@ -0,0 +1,32 @@
+# how to build?
+# docker login
+## .....input your docker id and password
+#docker build . -t prasathmani/tinyfilemanager:master
+#docker push prasathmani/tinyfilemanager:master
+
+# how to use?
+# docker run -d -v /absolute/path:/var/www/html/data -p 80:80 --restart=always --name tinyfilemanager prasathmani/tinyfilemanager:master
+
+FROM php:7.4-cli-alpine
+
+# if run in China
+# RUN sed -i 's/dl-cdn.alpinelinux.org/mirrors.aliyun.com/g' /etc/apk/repositories
+
+RUN apk add \
+    libzip-dev \
+    oniguruma-dev
+
+RUN docker-php-ext-install \
+    zip \
+    mbstring \
+    iconv \
+    fileinfo
+
+WORKDIR /var/www/html
+
+COPY tinyfilemanager.php index.php
+COPY config-sample.php config.php
+RUN sed -i "s/\$root_path =.*;/\$root_path = \$_SERVER['DOCUMENT_ROOT'].'\/data';/g" config.php && \
+    sed -i "s/\$root_url = '';/\$root_url = 'data\/';/g" config.php
+
+CMD ["sh", "-c", "php -S 0.0.0.0:80"]