Refactor devcontainer dockerfile to support Kaniko builds

Author: janekbaraniewski

.devcontainer/Dockerfile

@@ -4,7 +4,9 @@ ARG TARGETOS
 ARG TARGETARCH
 
 # Install Node.js
-RUN curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
+RUN apt-get update \
+    && apt-get install -y --no-install-recommends curl ca-certificates gnupg \
+    && curl -fsSL https://deb.nodesource.com/setup_20.x | bash - \
     && apt-get update \
     && apt-get install -y --no-install-recommends nodejs \
     && apt-get clean \
@@ -18,21 +20,24 @@ ENV RUSTUP_HOME=/usr/local/rustup \
 
 # Install Rust
 RUN set -eux; \
-    dpkgArch="$(dpkg --print-architecture)"; \
-    case "${dpkgArch##*-}" in \
-        amd64) rustArch='x86_64-unknown-linux-gnu'; rustupSha256='0b2f6c8f85a3d02fde2efc0ced4657869d73fccfce59defb4e8d29233116e6db' ;; \
-        armhf) rustArch='armv7-unknown-linux-gnueabihf'; rustupSha256='f21c44b01678c645d8fbba1e55e4180a01ac5af2d38bcbd14aa665e0d96ed69a' ;; \
-        arm64) rustArch='aarch64-unknown-linux-gnu'; rustupSha256='673e336c81c65e6b16dcdede33f4cc9ed0f08bde1dbe7a935f113605292dc800' ;; \
-        i386) rustArch='i686-unknown-linux-gnu'; rustupSha256='e7b0f47557c1afcd86939b118cbcf7fb95a5d1d917bdd355157b63ca00fc4333' ;; \
-        *) echo >&2 "unsupported architecture: ${dpkgArch}"; exit 1 ;; \
-    esac; \
-    url="https://static.rust-lang.org/rustup/archive/1.26.0/${rustArch}/rustup-init"; \
-    wget "$url"; \
-    echo "${rustupSha256} *rustup-init" | sha256sum -c -; \
-    chmod +x rustup-init; \
-    ./rustup-init -y --no-modify-path --profile minimal --default-toolchain $RUST_VERSION --default-host ${rustArch}; \
-    rm rustup-init; \
-    chmod -R a+w $RUSTUP_HOME $CARGO_HOME; \
+    dpkgArch="$(dpkg --print-architecture)" || exit 1; \
+    if [ "${dpkgArch}" = "amd64" ]; then \
+        rustArch="x86_64-unknown-linux-gnu"; rustupSha256="0b2f6c8f85a3d02fde2efc0ced4657869d73fccfce59defb4e8d29233116e6db"; \
+    elif [ "${dpkgArch}" = "armhf" ]; then \
+        rustArch="armv7-unknown-linux-gnueabihf"; rustupSha256="f21c44b01678c645d8fbba1e55e4180a01ac5af2d38bcbd14aa665e0d96ed69a"; \
+    elif [ "${dpkgArch}" = "arm64" ]; then \
+        rustArch="aarch64-unknown-linux-gnu"; rustupSha256="673e336c81c65e6b16dcdede33f4cc9ed0f08bde1dbe7a935f113605292dc800"; \
+    elif [ "${dpkgArch}" = "i386" ]; then \
+        rustArch="i686-unknown-linux-gnu"; rustupSha256="e7b0f47557c1afcd86939b118cbcf7fb95a5d1d917bdd355157b63ca00fc4333"; \
+    else \
+        echo "unsupported architecture: ${dpkgArch}" >&2; exit 1; \
+    fi; \
+    wget "https://static.rust-lang.org/rustup/archive/1.26.0/${rustArch}/rustup-init" -O /tmp/rustup-init; \
+    echo "${rustupSha256} */tmp/rustup-init" | sha256sum -c -; \
+    chmod +x /tmp/rustup-init; \
+    /tmp/rustup-init -y --no-modify-path --profile minimal --default-toolchain "$RUST_VERSION" --default-host "$rustArch"; \
+    rm /tmp/rustup-init; \
+    chmod -R a+w "$RUSTUP_HOME" "$CARGO_HOME"; \
     rustup --version; \
     cargo --version; \
     rustc --version