add db connection, refactor code, add db migration files

internal/foundry/types/ws_channels.go

@@ -0,0 +1,35 @@
+package types
+
+type Channels struct {
+	done chan struct{}
+	msg  chan *WsMessage
+	err  chan error
+}
+
+func (channels Channels) Err() chan error {
+	return channels.err
+}
+
+func (channels Channels) Msg() chan *WsMessage {
+	return channels.msg
+}
+
+func (channels Channels) Done() chan struct{} {
+	return channels.done
+}
+
+func (channels *Channels) Close() {
+	close(channels.done)
+	close(channels.err)
+	close(channels.msg)
+}
+
+func InitWsChannels() *Channels {
+	channels := Channels{
+		done: make(chan struct{}),
+		err:  make(chan error, 10),
+		msg:  make(chan *WsMessage, 10),
+	}
+
+	return &channels
+}

internal/foundry/types/ws_message.go

@@ -0,0 +1,17 @@
+package types
+
+import "fmt"
+
+type WsMessage struct {
+	Code    string
+	Id      int
+	MsgJson string
+}
+
+func (w WsMessage) ToString() string {
+	return fmt.Sprintf("%s%d%s", w.Code, w.Id, w.MsgJson)
+}
+
+func (w WsMessage) ToByteSlice() []byte {
+	return fmt.Appendf([]byte{}, "%s%d%s", w.Code, w.Id, w.MsgJson)
+}