Use Dockerfile to build Pakkero

Dockerfile

@@ -0,0 +1,19 @@
+FROM golang:alpine
+
+ENV CGO_ENABLED=0
+ENV GO111MODULE=off
+
+RUN apk add --update-cache upx git make binutils coreutils \
+    && rm -rf /var/cache/apk/*
+
+RUN upx --version
+
+RUN go version
+RUN go get -d -v github.com/89luca89/pakkero
+
+WORKDIR $GOPATH/src/github.com/89luca89/pakkero
+RUN make
+
+RUN ./dist/pakkero -v
+
+ENTRYPOINT ["./dist/pakkero"]

README.md

@@ -142,6 +142,34 @@ Go build works fine, but will skip a fundamental step in the building process, *
 
 This way the Pakkero binary has inside the source of the Launcher to be used for each packaging.
 
+#### Building using Docker
+
+Build Pakkero image:
+
+```sh
+sudo docker build . -t pakkero
+```
+
+Run containerized Pakkero:
+
+```sh
+sudo docker run -it -v <target_dir>:/ext pakkero --file /ext/<target_elf> -o /ext/<target_elf>.packed
+```
+
+#### Building using Podman
+
+Build Pakkero image:
+
+```sh
+sudo podman build . -t pakkero
+```
+
+Run containerized Pakkero:
+
+```sh
+sudo podman run -it -v <target_dir>:/ext pakkero --file /ext/<target_elf> -o /ext/<target_elf>.packed
+```
+
 #### Payload
 
 For this purpose the payload is simply compressed using zlib then encrypted using AES256-GCM