Update 'Dockerfile'

Dockerfile

@@ -1,18 +1,24 @@
+# Refer to https://github.com/rust-lang/docker-rust-nightly/blob/master/debian-slim/Dockerfile
+# Debian was the better choice and you're about to make a mistake
 #ARG DEBIAN_VERSION
 #FROM debian:${DEBIAN_VERSION}-slim
+
+# - BASED? BASED ON WHAT?
+# - based on Ubuntu 22.04 LTS «Jammy Jellyfish»
 FROM ubuntu:jammy
 
+# rust paths
 ENV RUSTUP_HOME=/usr/local/rustup \
     CARGO_HOME=/usr/local/cargo \
     PATH=/usr/local/cargo/bin:$PATH
 
+
 RUN set -eux; \
     apt update; \
     apt install -y --no-install-recommends \
-        ca-certificates \
-        gcc \
-        libc6-dev \
-        wget \
+        ca-certificates gcc libc6-dev wget \
+        ### https://github.com/emilk/eframe_template requirements
+        libxcb-render0-dev libxcb-shape0-dev libxcb-xfixes0-dev libspeechd-dev libxkbcommon-dev libssl-dev
         ; \
     dpkgArch="$(dpkg --print-architecture)"; \
     case "${dpkgArch##*-}" in \
@@ -24,7 +30,8 @@ RUN set -eux; \
     url="https://static.rust-lang.org/rustup/dist/${rustArch}/rustup-init"; \
     wget "$url"; \
     chmod +x rustup-init; \
-    ./rustup-init -y --no-modify-path --default-toolchain nightly --target x86_64-pc-windows-gnu; \
+    ./rustup-init -y --no-modify-path --default-toolchain nightly \
+    --target x86_64-pc-windows-gnu; \
     rm rustup-init; \
     chmod -R a+w $RUSTUP_HOME $CARGO_HOME; \
     rustup --version; \
@@ -32,6 +39,8 @@ RUN set -eux; \
     rustc --version; \
     \
     apt remove -y --auto-remove \
+        ### ditch the wget who needs that
         wget \
         ; \
+    ### wipe apt cache
     rm -rf /var/lib/apt/lists/*;