chore: Add dockerfile and interface and files for support firewalls

Dockerfile

@@ -0,0 +1,18 @@
+FROM golang:1.26.1 AS Builder 
+
+COPY go.mod go.sum ./
+
+RUN go mod download
+
+COPY . .
+
+ENV CGO_ENABLED=0
+
+RUN go build -o /bin/agent .
+
+
+FROM alpine:latest
+
+COPY --from=Builder /bin/agent /bin/agent
+
+ENTRYPOINT ["/bin/agent"]

go.mod

@@ -1,9 +1,10 @@
 module gitea.d3m0k1d.ru/HellreigN/Agent
 
-go 1.26.4
+go 1.26.1
+
+require github.com/spf13/cobra v1.10.2
 
 require (
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
-	github.com/spf13/cobra v1.10.2 // indirect
 	github.com/spf13/pflag v1.0.10 // indirect
 )

internal/firewall/firewalld.go

@@ -0,0 +1 @@
+package firewall

internal/firewall/iptables.go

@@ -0,0 +1 @@
+package firewall

internal/firewall/nftables.go

@@ -0,0 +1 @@
+package firewall

internal/firewall/type.go

@@ -0,0 +1,4 @@
+package firewall
+
+type Firewall interface {
+}