add wasm

README.md

@@ -34,6 +34,17 @@ We've provided a set of Dockerfiles covering common use cases. These Dockerfiles
 - [Node.js Application](./docker-ready-to-go/node_container/)
 - [Rust Application](./docker-ready-to-go/rust_container/)
 
+## Docker Wasm
+
+Simplest walkthrough in the web landscape to run a wasm container in Docker without pain and without Docker Desktop. 
+
+You just need four simple steps to run any wasm runtime.
+
+- How to configure docker for wasm [here](./docker-wasm/).
+- How to create a wasm image [COMING SOON]()
+
+It works for real!🚀
+
 ## Contributing
 
 We welcome contributions from the community! If you have a Docker tip, a useful Dockerfile, or an improvement to an existing one, feel free to open a pull request. Please make sure to follow our [contribution guidelines](CONTRIBUTING.md).

docker-wasm/README.md

@@ -0,0 +1,47 @@
+## How to run a Docker wasm container
+
+Step zero is creating/modifing your `/etc/docker/daemon.json` file, adding this feature:
+
+```json
+{
+  "features": {
+    "containerd-snapshotter": true
+  }
+}
+```
+Save, close and restart docker:
+
+```bash
+systemctl restart docker
+```
+
+First step is compiling the containerd-shim-wasmtime that we will use later as runtime in docker.
+
+```bash
+docker build --output . - <<EOF
+FROM rust:1.70.0 as build
+RUN apt-get update -y
+RUN apt-get install protobuf-compiler libdbus-1-dev pkg-config -y
+RUN cargo install \
+    --git https://github.com/mfranzon/runwasi.git \
+    --branch oci-artifacts \
+    --bin containerd-shim-wasmtime-v1 \
+    --root /out \
+    containerd-shim-wasmtime
+FROM scratch
+COPY --from=build /out/bin /
+EOF
+```
+
+Second step, move the executable into an exported PATH like `/usr/local/bin`
+
+```bash
+mv ./containerd-shim-wasmtime-v1 /usr/local/bin
+```
+
+Last step, enjoy your docker wasm
+
+```bash
+docker run --runtime=io.containerd.wasmtime.v1 --platform wasi/wasm32 rumpl/wasmtest echo 'hello from wasm'
+```
+