Add dockerfile to build inside a docker container

.dockerignore

@@ -0,0 +1,3 @@
+dist/
+types/
+node_modules/

.gitignore

@@ -1,2 +1,3 @@
 dist/
 types/
+node_modules/

Dockerfile

@@ -0,0 +1,22 @@
+# base Go image version.
+FROM golang:1.12-buster
+
+WORKDIR /project
+
+# install some dependencies from apt-get.
+RUN curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | apt-key add -
+RUN echo "deb https://dl.yarnpkg.com/debian/ stable main" | tee /etc/apt/sources.list.d/yarn.list
+RUN apt-get update -y && \
+    apt-get install -y yarn unzip && \
+    rm -rf /var/lib/apt/lists/*
+
+# install myitcv/gopherjs
+RUN git clone https://github.com/myitcv/gopherjs /gopherjs
+RUN cd /gopherjs && GO111MODULE=on go install
+
+# install yarn dependencies
+COPY package.json yarn.lock ./
+RUN yarn install
+
+# copy source
+COPY . .

README.md

@@ -99,3 +99,29 @@ See [`EXTEND.md`](https://github.com/cosmos/amino-js/blob/extend/EXTEND.md) for
 `amino-js` is very new! Questions, feedback, use cases, issues, and code are all very, very welcome.
 
 Thank you for helping us help you help us all. 🎁
+
+### Build inside a Docker Container
+
+If you wish to build this lib without having to install Go 1.12, GopherJS and Yarn on your local computer, you can build it inside a docker container. You only need docker to be installed on your computer.
+
+Run the following commands in the root path of this repository.
+
+#### Build the docker image
+
+```
+docker build .
+```
+
+### Run yarn in the docker container
+
+You can run any yarn command inside the container. By sharing the current path to the container, any new files will be available on the host.
+
+Run `yarn setup` and `yarn test`:
+```
+docker run --rm -it -v $(PWD)/dist:/project/dist -v $(PWD)/types:/project/types $(docker build -q .) yarn setup && yarn test
+```
+
+Run `yarn publish`:
+```
+docker run --rm -it -v $(PWD)/dist:/project/dist -v $(PWD)/types:/project/types $(docker build -q .) yarn publish
+```

package.json

@@ -26,7 +26,7 @@
         "go":             "cd go/js && gopherjs build -v -o ../../lib/Amino.js .",
         "go:min":         "yarn go -m",
         "go:watch":       "yarn go -w",
-        "gzip":           "gzip -kf dist/*.{js,map}",
+        "gzip":           "gzip -kf dist/*.js dist/*.map",
         "lint":           "eslint --ext .ts,.js .",
         "nuke":           "rm -rf **/node_modules yarn.lock",
         "prepublishOnly": "yarn dirs && yarn lint && yarn tsc && yarn dist:prod && yarn test",