Change Dockerfile to run as non-root user (#80)

Dockerfile

@@ -1,14 +1,14 @@
 FROM golang:1.21.4-alpine AS builder
-WORKDIR /src/
-COPY . .
-RUN go get -d -v ./...
-RUN go build -o liquidator
+    WORKDIR /src/
+    COPY . .
+    RUN go get -d -v ./...
+    RUN go build -o liquidator
 
 FROM alpine:latest
-RUN apk --no-cache add ca-certificates
-WORKDIR /src/
-COPY --from=builder /src/liquidator .
-
-EXPOSE 9000
-
-ENTRYPOINT ["./liquidator"]
+    RUN adduser -D ep
+    RUN apk --no-cache add ca-certificates
+    USER ep
+    WORKDIR /home/ep
+    COPY --from=builder /src/liquidator /usr/bin/liquidator
+    EXPOSE 9000
+    ENTRYPOINT ["liquidator"]