use bash instead

Dockerfile

@@ -5,7 +5,7 @@ RUN go build -o kforge .
 
 FROM alpine:3.19
 COPY --from=builder /app/kforge /usr/local/bin/kforge
-RUN apk add --no-cache curl docker-cli && \
+RUN apk add --no-cache curl bash docker-cli && \
     curl -LO "https://dl.k8s.io/release/$(curl -L -s https://dl.k8s.io/release/stable.txt)/bin/linux/amd64/kubectl" && \
     install -o root -g root -m 0755 kubectl /usr/local/bin/kubectl
 COPY entrypoint.sh /entrypoint.sh

entrypoint.sh

@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 set -e
 
 # INPUT_FILE="$1"