Add Alpine Dockerfile (#1048)

docker/alpine/Dockerfile

@@ -0,0 +1,42 @@
+FROM alpine:3.14
+
+ARG USER=drogon
+ARG UID=1000
+ARG GID=1000
+ARG USER_HOME=/drogon
+
+ENV TZ=UTC
+
+RUN apk update && apk --no-cache --upgrade add tzdata \
+    && ln -snf /usr/share/zoneinfo/$TZ /etc/localtime \
+    && echo $TZ > /etc/timezone
+
+RUN apk --no-cache --upgrade add \
+    sudo curl wget cmake make pkgconfig git gcc g++ \
+    openssl libressl-dev jsoncpp-dev util-linux-dev zlib-dev c-ares-dev \
+    postgresql-dev mariadb-dev sqlite-dev hiredis-dev
+
+RUN addgroup -S -g $GID $USER \
+    && adduser -D -u $UID -G $USER -h $USER_HOME $USER \
+    && mkdir -p /etc/sudoers.d \
+    && echo "$USER ALL=(ALL) NOPASSWD: ALL" > /etc/sudoers.d/$USER \
+    && chmod 0440 /etc/sudoers.d/$USER
+
+USER $USER
+WORKDIR $USER_HOME
+
+ENV LANG=en_US.UTF-8 \
+    LANGUAGE=en_US:en \
+    LC_ALL=en_US.UTF-8 \
+    CC=gcc \
+    CXX=g++ \
+    AR=gcc-ar \
+    RANLIB=gcc-ranlib \
+    DROGON_INSTALLED_ROOT=$USER_HOME/install
+
+RUN wget -O $USER_HOME/version.json https://api.github.com/repos/an-tao/drogon/git/refs/heads/master \
+    && git clone https://github.com/an-tao/drogon $DROGON_INSTALLED_ROOT
+
+RUN cd $DROGON_INSTALLED_ROOT \
+    && sed -i 's/bash/sh/' ./build.sh \
+    && ./build.sh

docker/alpine/README.md

@@ -0,0 +1,32 @@
+## Build Docker Image
+
+```shell
+$ cd drogon/docker/alpine # from this repository
+$ docker build --no-cache --build-arg UID=`id -u` --build-arg GID=`id -g` -t drogon-alpine . # include last dot(.)
+```
+
+## Create a Drogon Project
+
+```shell
+$ cd ~/drogon_app # example
+$ docker run --rm -v="$PWD:/drogon/app" -w="/drogon/app" drogon-alpine drogon_ctl create project hello_world
+```
+
+## Build the Project
+
+```shell
+$ cd hello_world
+$ docker run --rm --volume="$PWD:/drogon/app" -w="/drogon/app/build" drogon-alpine sh -c "cmake .. && make"
+```
+
+## Start Server
+
+```shell
+$ docker run --name drogon_test --rm -u 0 -v="$PWD/build:/drogon/app" -w="/drogon/app" -p 8080:80 -d drogon-alpine ./hello_world # expose port 80 to 8080
+```
+
+## Stop Server
+
+```shell
+$ docker kill drogon_test
+```