refactor: simplify Dockerfile by removing prebuilt binary stage and consolidating builder selection

Author: Hakob23

docker-compose/lps/Dockerfile

@@ -1,8 +1,4 @@
-ARG USE_PREBUILT=source
-ARG TARGETARCH=amd64
-
-# Builder stage for compiling from source
-FROM --platform=linux/${TARGETARCH} golang:1.23.8@sha256:e54daaadd35ebb90fc1404ecdc6eb7338ae13555f71a71856ad96976ae084e44 AS builder-source
+FROM --platform=linux/amd64 golang:1.23.8@sha256:e54daaadd35ebb90fc1404ecdc6eb7338ae13555f71a71856ad96976ae084e44 AS builder
 
 ARG COMMIT_HASH
 ARG COMMIT_TAG
@@ -23,19 +19,9 @@ RUN if [[ "$LPS_STAGE" != "regtest" ]]; \
     else make build;                    \
     fi
 
-# Builder stage for pre-built binary
-FROM --platform=linux/${TARGETARCH} alpine:3.19.1@sha256:c5b1261d6d3e43071626931fc004f70149baeba2c8ec672bd4f27761f8e1ad6b AS builder-prebuilt
-
-WORKDIR /code
-COPY build/liquidity-provider-server /code/build/liquidity-provider-server
-
-# Select the appropriate builder based on USE_PREBUILT arg
-FROM builder-${USE_PREBUILT} AS selected-builder
-
-# Final stage
-FROM --platform=linux/${TARGETARCH} alpine:3.19.1@sha256:c5b1261d6d3e43071626931fc004f70149baeba2c8ec672bd4f27761f8e1ad6b
+FROM --platform=linux/amd64 alpine:3.19.1@sha256:c5b1261d6d3e43071626931fc004f70149baeba2c8ec672bd4f27761f8e1ad6b
 
-COPY --from=selected-builder /code/build/liquidity-provider-server /usr/local/bin/liquidity-provider-server
+COPY --from=builder /code/build/liquidity-provider-server /usr/local/bin/liquidity-provider-server
 
 ARG HOME="/home/lps"
 RUN adduser -u 1000 --home="$HOME" lps -D lps