Switch to Gitea Ubuntu runner image as base

Dockerfile

@@ -1,23 +1,25 @@
-FROM rust:slim as builder
+FROM gitea/runner-images:ubuntu-latest
 
 WORKDIR /app
 
-RUN rustup default nightly
-RUN rustup target add wasm32-unknown-unknown
-RUN cargo install cargo-leptos
-
 # Install a few dependencies
 RUN set -eux; \
     apt-get update; \
     apt-get install -y --no-install-recommends \
-		pkg-config \
 		clang \
-		build-essential \
-		libssl-dev \
-		libpq-dev \
-		wget; \
+		build-essential; \
 	rm -rf /var/lib/apt/lists/*
 
+# Install Rustup
+RUN curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y
+
+# Include Rust binaries in PATH
+ENV PATH="/root/.cargo/bin:${PATH}"
+
+RUN rustup default nightly
+RUN rustup target add wasm32-unknown-unknown
+RUN cargo install cargo-leptos
+
 # Install ImageMagick
 RUN cd / && \
 	wget https://github.com/ImageMagick/ImageMagick/archive/refs/tags/7.1.1-38.tar.gz && \