feat: revert to use webp executable

Dockerfile

@@ -1,4 +1,4 @@
-FROM debian:sid-slim
+FROM alpine:latest
 LABEL authors="Belphemur"
 ARG APP_PATH=/usr/local/bin/CBZOptimizer
 ENV USER=abc
@@ -6,22 +6,21 @@ ENV CONFIG_FOLDER=/config
 ENV PUID=99
 
 RUN mkdir -p "${CONFIG_FOLDER}" && \
-    useradd \
-        --system \
-        --no-create-home \
-        --home-dir "${CONFIG_FOLDER}" \
-        --gid "users" \
-        --uid "${PUID}" \
+    adduser \
+        -S \
+        -H \
+        -h "${CONFIG_FOLDER}" \
+        -G "users" \
+        -u "${PUID}" \
         "${USER}" && \
         chown ${PUID}:users "${CONFIG_FOLDER}"
 
 COPY CBZOptimizer ${APP_PATH}
 
-RUN apt-get update && \
-    apt-get full-upgrade -y && \
-    apt-get install -y inotify-tools bash-completion libwebp7 && \
-    apt-get clean && \
-    rm -rf /var/lib/apt/lists/* && \
+RUN apk add --no-cache \
+    inotify-tools \
+    bash \
+    bash-completion && \
     chmod +x ${APP_PATH} && \
     ${APP_PATH} completion bash > /etc/bash_completion.d/CBZOptimizer