feat: add Dockerfile

Dockerfile

@@ -0,0 +1,51 @@
+FROM alpine:latest
+
+ARG VIPS_VERSION=8.9.1
+ARG VIPS_URL=https://github.com/libvips/libvips/releases/download
+
+RUN apk update && apk upgrade
+
+# basic packages libvips likes
+RUN apk add \
+	build-base \
+	autoconf \
+	automake \
+	libtool \
+	bc \
+	zlib-dev \
+	expat-dev \
+	jpeg-dev \
+	tiff-dev \
+	glib-dev \
+	libjpeg-turbo-dev \
+	libexif-dev \
+	lcms2-dev \
+	fftw-dev \
+	giflib-dev \
+	libpng-dev \
+	libwebp-dev \
+	orc-dev \
+	libgsf-dev 
+
+# text rendering ... we have to download some fonts and rebuild the font
+# cache
+RUN apk add \
+	pango-dev \
+	msttcorefonts-installer \
+    wqy-zenhei --update-cache --repository http://nl.alpinelinux.org/alpine/edge/testing --allow-untrusted
+RUN update-ms-fonts \
+	&& fc-cache -f
+
+# there are other optional deps you can add for openslide / openexr /
+# imagmagick support / Matlab support etc etc
+
+# installing to /usr is not the best idea, but it's easy
+RUN wget -O- ${VIPS_URL}/v${VIPS_VERSION}/vips-${VIPS_VERSION}.tar.gz | tar xzC /tmp
+RUN cd /tmp/vips-${VIPS_VERSION} \
+	&& ./configure --prefix=/usr --disable-static --disable-debug \
+	&& make V=0 \
+	&& make install 
+
+RUN apk add ruby-dev
+RUN rm -rf /var/cache/apk/*
+RUN gem install bundler && gem install json && gem install daily_image

README.md

@@ -78,6 +78,23 @@ Common options:
 
 ```
 
+### docker 
+
+打包镜像
+
+```shell
+$ docker build . -t ruby-image
+
+```
+
+使用
+
+```shell
+$ docker run -it --mount src="$(pwd)",target=/home,type=bind ruby-image daily_image -s /home/
+```
+
+然后你就可以在当前目录看到新生成的图片文件了
+
 ## 示例
 
 ![](./tmp/daily_2018-10-06.jpeg)