Add bash to Dockerfile.

Dockerfile

@@ -9,7 +9,7 @@ RUN  --mount=type=cache,target=/go/pkg/mod \
      GOOS=${TARGETOS} GOARCH=${TARGETARCH} go build -o trufflehog .
 
 FROM alpine:3.15
-RUN apk add --no-cache git ca-certificates \
+RUN apk add --no-cache bash git ca-certificates \
     && rm -rf /var/cache/apk/* && \
     update-ca-certificates
 COPY --from=builder /build/trufflehog /usr/bin/trufflehog

entrypoint.sh

@@ -1,5 +1,6 @@
-#!/usr/bin/env ash
+#!/usr/bin/env bash
 
-# `$*` expands the `args` supplied in an `array` individually
-# or splits `args` in a string separated by whitespace.
-/usr/bin/trufflehog $*
+# Parse the last argument into an array of extra_args.
+mapfile -t extra_args < <(bash -c "for arg in ${*: -1}; do echo \$arg; done")
+
+/usr/bin/trufflehog "${@: 1: $#-1}" "${extra_args[@]}"