```python
from seedemu import *
from seedemu.layers import Base, Ebgp, Ibgp, Ospf, Ethereum
from seedemu.services import EthereumService, BeaconSetupNode, BootNode, ValidatorNode

# Create a base layer
base = Base()

# Create 10 Stub ASes with 3 hosts each
for asn in range(100, 110):
    asys = base.createAutonomousSystem(asn)
    for i in range(1, 4):
        asys.createHost(f'h{asn}-{i}')

# Create an Ethereum service layer
ethereum = Ethereum()

# Create a blockchain named "pos" with consensus mechanism set to POS
pos_chain = ethereum.createBlockchain('pos', consensus='POS', terminalTotalDifficulty=30)

# For each host in the AS, create a blockchain virtual node, a Docker container label, and enable Geth communication
for asn in range(100, 110):
    for i in range(1, 4):
        hostname = f'h{asn}-{i}'
        vnode = pos_chain.createVirtualNode(hostname)
        vnode.setDisplayName(f'Node_{asn}_{i}')
        vnode.enableHttpApi()
        pos_chain.bindPhysicalNode(vnode.getName(), hostname)

        # Customize nodes: BeaconSetupNode, BootNode, and ValidatorNode
        if asn == 100 and i == 1:
            vnode.addService(BeaconSetupNode())
        if asn == 100 and i == 2:
            vnode.addService(BootNode())
        if asn == 100 and i == 3:
            vnode.addService(ValidatorNode())

# Add the Ethereum layer to the emulator
emu = Emulator()
emu.addLayer(base)
emu.addLayer(ethereum)

# Render and compile with Docker
emu.render()

emu.compile(Docker(), './output', overwrite=True, internetMap=True, etherView=True)
```