install prereqs for gopacket

Dockerfile

@@ -6,13 +6,13 @@ WORKDIR /app
 COPY . .
 ENV GO111MODULE=auto
 
-RUN apk add git
+RUN apk add git libpcap-dev
 RUN GOOS=linux CGO_ENABLED=1 go build ${tags} -ldflags="-s -X 'main.version=${version}'" .
 # RUN go build -tags=ee . -o netmaker main.go
 FROM alpine:3.16.2
 
 # add a c lib
-RUN apk add gcompat iptables wireguard-tools
+RUN apk add gcompat iptables wireguard-tools libpcap-dev
 # set the working directory
 WORKDIR /root/
 RUN mkdir -p /etc/netclient/config