Add expanded port syntax to Compose schema and types.

This commit adds expanded port syntax to Compose schema and types
so that it is possible to have
```
ports:
  - mode: host
    target: 80
    published: 9005
```

Signed-off-by: Yong Tang <yong.tang.github@outlook.com>

compose/schema/data/config_schema_v3.1.json

@@ -167,8 +167,20 @@
  "ports": {
  "type": "array",
  "items": {
- "type": ["string", "number"],
- "format": "ports"
+ "oneOf": [
+ {"type": "number", "format": "ports"},
+ {"type": "string", "format": "ports"},
+ {
+ "type": "object",
+ "properties": {
+ "mode": {"type": "string"},
+ "target": {"type": "integer"},
+ "published": {"type": "integer"},
+ "protocol": {"type": "string"}
+ },
+ "additionalProperties": false
+ }
+ ]
  },
  "uniqueItems": true
  },

compose/types/types.go

@@ -106,7 +106,7 @@ type ServiceConfig struct {
  NetworkMode string `mapstructure:"network_mode"`
  Networks map[string]*ServiceNetworkConfig
  Pid string
- Ports StringOrNumberList
+ Ports []ServicePortConfig
  Privileged bool
  ReadOnly bool `mapstructure:"read_only"`
  Restart string
@@ -215,6 +215,14 @@ type ServiceNetworkConfig struct {
  Ipv6Address string `mapstructure:"ipv6_address"`
 }
 
+// ServicePortConfig is the port configuration for a service
+type ServicePortConfig struct {
+ Mode string
+ Target uint32
+ Published uint32
+ Protocol string
+}
+
 // ServiceSecretConfig is the secret configuration for a service
 type ServiceSecretConfig struct {
  Source string