refactor: simplify Dockerfile by using official Hugo image instead of custom build

Dockerfile

@@ -1,20 +1,9 @@
 # Stage 1: Build the Hugo site
-FROM alpine:3.19 AS builder
+# Use the official Hugo Docker image (klakegg/hugo) which is always updated with the latest version
+FROM klakegg/hugo:latest-ext AS builder
 
-# Install dependencies
-RUN apk add --no-cache wget tar jq curl
-
-# Install latest Hugo extended version
-RUN LATEST_RELEASE=$(curl -s https://api.github.com/repos/gohugoio/hugo/releases/latest | jq -r '.tag_name') && \
-    VERSION=${LATEST_RELEASE#v} && \
-    echo "Installing latest Hugo version: $VERSION" && \
-    wget https://github.com/gohugoio/hugo/releases/download/${LATEST_RELEASE}/hugo_extended_${VERSION}_linux-amd64.tar.gz -O hugo.tar.gz && \
-    mkdir -p /tmp/hugo && \
-    tar -xzf hugo.tar.gz -C /tmp/hugo && \
-    mv /tmp/hugo/hugo /usr/local/bin/ && \
-    rm -rf /tmp/hugo hugo.tar.gz && \
-    chmod +x /usr/local/bin/hugo && \
-    hugo version
+# Show Hugo version for build logs
+RUN hugo version
 
 # Set the working directory in the container
 WORKDIR /src